@mmtenia : Please can you confirm the model number of your TV? This can be found on the sticker on the back of the device, or in Settings > Support > About This TV.
In the meantime, please power off the TV and unplug it at the wall. Now, unplug your router for 30 seconds, plug it back in, and allow time for the reset/recalibration process to complete. After resetting your router, plug your TV back in and power it on using the remote control.